It was already set to IGFX. I'm consistently getting the " Miner failed to initialize. need to restart." I'm running Windows 10, fully updated, but so are my other machines.
People who faced this issue narrowed it down to the Windows update and Integrated graphics. As you have alright tried uninstalling integrated graphics and it didn't work.
I'll suggest to roll back any Windows update you've done recently or perform a fresh installation of Windows.
If going with the second option, try Windows 10 LTSC variant.